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if statement as a variable

if statement as a variable

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skirkpatrick	6 Mar, 2008 - 02:12 PM Post #1
New D.I.C Head Joined: 18 Feb, 2008 Posts: 11	I am trying to create a variable using an if/else statement in order to be able to pass the variable to the next page. The if/ else is a simple math function that take a beginning quantity from the database and subtract another number from the beginning quantity - if the result is less than 0 then display 0. If not display the resulting number. I want the results to be a variable that I can then pass along to the database. CODE if($products['products_quantity'] - $_POST['subtractnumber'] <= 0) { echo "0"; } else { echo $products['products_quantity'] - $_POST['subtractnumber']; } I am going somewhat brain dead on this any help is greatly appreciated
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Martyr2

RE: If Statement As A Variable
6 Mar, 2008 - 02:26 PM

Post #2

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My Contributions

I am not completely sure what you are having trouble with. Your example is very much on the right track.

php


// Set a default quantity for our variable
$newqty = 0;

// If they pass a subtract number and that number is greater than zero
if (isset($_POST["subtractnumber"]) && ($_POST["subtractnumber"] > 0)) {

     // Find the new quantity 
     $newqty = $products['products_quantity'] - $_POST['subtractnumber'] ;

     // If the new quantity is less than zero, set it to zero 
     // (you might also want them to know there is not that much to subtract)
     if ($newqty <= 0) { $newqty = 0; }
}

echo "Quantity is: $newqty";

// Now lets pass to a database...

$sql = "Update products set quantity = $newqty where productID = 2";

// Go one executing the query on your database...

I hope this is what you were asking. The $newqty variable would be your variable to do whatever you want with and update the database if so desired.

Enjoy!

"At DIC we be new quantity calculating code ninjas!"

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skirkpatrick	RE: If Statement As A Variable 7 Mar, 2008 - 09:08 AM Post #3
New D.I.C Head Joined: 18 Feb, 2008 Posts: 11	Thank you - That helped immensly. I knew I was close but just couldn't get it. Sometimes you are too close to the trees to see the forest. Thanks Again.
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